CN214413091U - LED drive power supply turns off control circuit that adjusts luminance - Google Patents
LED drive power supply turns off control circuit that adjusts luminance Download PDFInfo
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- CN214413091U CN214413091U CN202120793574.4U CN202120793574U CN214413091U CN 214413091 U CN214413091 U CN 214413091U CN 202120793574 U CN202120793574 U CN 202120793574U CN 214413091 U CN214413091 U CN 214413091U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The application relates to an LED driving power supply dimming turn-off control circuit, which comprises a temperature sensing circuit, a control circuit, a USB power supply circuit and a dimming circuit, wherein the input end of the temperature sensing circuit is electrically connected with a power supply VCC, and the output end of the temperature sensing circuit is electrically connected with the control circuit; the input end of the control circuit is electrically connected with a power supply VCC, the output end of the control circuit is grounded, and the control circuit is electrically connected with the USB power supply circuit; the input end of the USB power supply circuit is electrically connected with a power supply VCC, the output end of the USB power supply circuit is grounded, and the USB power supply circuit is electrically connected with the input end of the dimming circuit; the output end of the dimming circuit is electrically connected with the LED lamp, and the LED lamp is grounded. This application has the effect of being convenient for protect the LED lamp.
Description
Technical Field
The application relates to the field of LED drive circuits, in particular to an LED drive power supply dimming turn-off control circuit.
Background
The dimming turn-off control circuit is a control circuit which can adjust the brightness of the LED lamp and control the on-off of the LED lamp.
In the related art, the LED driving power dimming turn-off control circuit includes a dimming circuit and a switch, an input end of the dimming circuit is electrically connected to the power supply, an output end of the dimming circuit is electrically connected to the LED lamp, and the switch is electrically connected between the dimming circuit and the LED lamp for controlling the circuit to be turned on or off.
In view of the above-mentioned related art, the inventor believes that the LED lamp may overheat after being used for a long time, and the LED driving circuit needs to be manually turned off by a user, which causes a defect that it is inconvenient to protect the LED lamp.
SUMMERY OF THE UTILITY MODEL
In order to protect the LED lamp, the application provides an LED drive power supply cuts off control circuit that adjusts luminance.
The application provides a LED drive power supply cuts off control circuit that adjusts luminance adopts following technical scheme:
a light modulation turn-off control circuit of an LED driving power supply comprises a temperature sensing circuit, a control circuit, a USB power supply circuit and a light modulation circuit, wherein the input end of the temperature sensing circuit is electrically connected with a power VCC, and the output end of the temperature sensing circuit is electrically connected with the control circuit;
the input end of the control circuit is electrically connected with a power supply VCC, the output end of the control circuit is grounded, and the control circuit is electrically connected with a USB power supply circuit;
the input end of the USB power supply circuit is electrically connected with a power supply VCC, the output end of the USB power supply circuit is grounded, and the USB power supply circuit is electrically connected with the input end of the dimming circuit;
the output end of the dimming circuit is electrically connected with the LED lamp, and the LED lamp is grounded.
Through adopting above-mentioned technical scheme, being provided with of temperature-sensing circuit does benefit to and responds to the temperature around the LED lamp, if when the temperature was too high, temperature-sensing circuit sent the signal of telecommunication to control circuit, and control circuit control USB supply circuit disconnection for USB supply circuit stops to exchange the light circuit power supply, and then makes the LED lamp close, thereby is convenient for protect the LED lamp.
Optionally, the temperature sensing circuit includes a thermistor RT, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a voltage comparator N1, an input end of the thermistor RT is electrically connected to a power VCC, an output end of the thermistor RT is electrically connected to an anode input end of the voltage comparator N1, one end of the resistor R4 is grounded, and the other end of the resistor R4 is electrically connected to an output end of the thermistor RT and an anode input end of the voltage comparator;
the input end of the resistor R1 is electrically connected with a power supply VCC, the output end of the resistor R1 is electrically connected with the input end of the resistor R3 and the input end of the resistor R2, the output end of the resistor R2 is grounded, and the output end of the resistor R3 is electrically connected with the negative input end of the voltage comparator N1;
the output end of the voltage comparator N1 is electrically connected with the input end of the control circuit.
Through adopting above-mentioned technical scheme, when the temperature around the LED lamp is lower, voltage comparator N1's output low level, control circuit is the disconnection setting, and USB supply circuit normally works this moment, and when the temperature around the LED lamp was higher, voltage comparator N1's output high level, control circuit switched on, and then control USB supply circuit stop work to be convenient for protect the LED lamp.
Optionally, the control circuit includes light emitting diode D1, time relay KT1 and NPN triode Q1, the base of NPN triode Q1 and voltage comparator N1's output electric connection, NPN triode Q1's collecting electrode and time relay KT 1's output electric connection, time relay KT 1's input and light emitting diode D1's output electric connection, light emitting diode D1's input and power VCC electric connection, time relay KT 1's first public end and power VCC electric connection, time relay KT 1's normally closed contact and USB power supply circuit electric connection, NPN triode Q1's emitter ground.
By adopting the technical scheme, when the output end of the voltage comparator N1 outputs a low level, the NPN triode Q1 is cut off, so that the control circuit is disconnected, and the USB power supply circuit works normally; when the output end of the voltage comparator N1 outputs a high level, the NPN triode Q1 is conducted, so that the control circuit is conducted, the time relay KT1 works normally, the light emitting diode D1 is conducted and emits light for prompting a user, and the USB power supply circuit is disconnected after time delay, so that the LED lamp is protected.
Optionally, the USB power supply circuit includes the USB power supply socket, the input of USB power supply socket and time relay KT 1's normally closed contact electric connection, the output ground connection of USB power supply socket, the USB power supply socket be used for with dimmer circuit electric connection.
Through adopting above-mentioned technical scheme, USB power supply socket set up be favorable to with dimmer circuit high-speed joint, can control opening or closing of LED lamp through the power supply or the outage of control USB power supply socket to be convenient for protect the LED lamp.
Optionally, the second public end and the power VCC electric connection of time relay KT1, the first normally open contact electric connection of time relay KT1 has alarm circuit, alarm circuit's input and power VCC electric connection, alarm circuit's output ground connection.
By adopting the technical scheme, the alarm circuit is beneficial to prompting a user through alarming, and is beneficial to the user to know the overheating information of the LED lamp, so that the LED lamp is protected conveniently.
Optionally, the alarm circuit includes resistance R5, NPN triode Q2 and electric bell HA1, the first normally open contact of time relay KT1 and one of them one end electric connection of resistance R5, the resistance R5 other end and NPN triode Q2's base electric connection, NPN triode Q2's collecting electrode and electric bell HA 1's output electric connection, electric bell HA 1's input and power VCC electric connection, NPN triode Q2's emitter ground.
By adopting the technical scheme, when the first normally open contact of the time relay KT1 is conducted with the second public end, the NPN triode Q2 is conducted, so that the electric bell HA1 is powered on and gives an alarm, and the user can be prompted conveniently.
Optionally, the dimming circuit includes a USB plug and a dimming control module, the USB plug is used for being electrically connected with a USB power supply socket, the input end of the dimming control module is electrically connected with the USB plug, the output end of the dimming control module is electrically connected with the input end of the LED lamp, the output end of the LED lamp is grounded, and the dimming control module is used for adjusting the brightness of the LED lamp or turning off the LED lamp.
Through adopting above-mentioned technical scheme, the USB plug mutually supports with USB supply circuit, realizes the high-speed joint, and the light control module is provided with and does benefit to and adjusts luminance and turn-off LED lamp.
Optionally, the third public end of the time relay KT1 is electrically connected with a power supply VDD, the second normally open contact of the time relay KT1 is electrically connected with a remote alarm circuit, and the remote alarm circuit is used for remote alarm.
Through adopting above-mentioned technical scheme, remote alarm circuit be provided with do benefit to the user that the LED lamp was kept away from in the warning to be more convenient for point out user's LED lamp overheated fast.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the temperature sensing circuit is arranged to be beneficial to sensing the temperature around the LED lamp, if the temperature is too high, the temperature sensing circuit sends an electric signal to the control circuit, and the control circuit controls the USB power supply circuit to be disconnected, so that the USB power supply circuit stops supplying power to the dimming circuit, and the LED lamp is turned off, and the LED lamp is protected conveniently.
When the temperature around the LED lamp is lower, voltage comparator N1's output low level, control circuit is the disconnection setting, and USB supply circuit normally works this moment, and when the temperature around the LED lamp was higher, voltage comparator N1's output high level, control circuit switched on, and then control USB supply circuit stop work to be convenient for protect the LED lamp.
3. When a first normally open contact and a second common end of the time relay KT1 are conducted, the NPN triode Q2 is conducted, so that the electric bell HA1 is powered on and gives an alarm, and a user is prompted conveniently.
Drawings
Fig. 1 is a schematic diagram of a circuit connection structure of the temperature sensing circuit, the control circuit, the alarm circuit, the USB power supply circuit, and the dimming circuit in this embodiment.
Fig. 2 is a schematic circuit diagram of the remote alarm circuit in the present embodiment.
Description of reference numerals: 1. a temperature sensing circuit; 2. a control circuit; 3. a USB power supply circuit; 4. a dimming circuit; 5. an alarm circuit; 6. a remote alarm circuit.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses LED drive power supply cuts off control circuit that adjusts luminance. Referring to fig. 1, an LED driving power supply dimming turn-off control circuit includes a temperature sensing circuit 1, a control circuit 2, a USB power supply circuit 3 and a dimming circuit 4, an input end of the temperature sensing circuit 1 is electrically connected to a power VCC, and an output end of the temperature sensing circuit 1 is electrically connected to the control circuit 2. The input end of the control circuit 2 is electrically connected with the power supply VCC, the output end of the control circuit 2 is grounded, and the control circuit 2 is electrically connected with the USB power supply circuit 3. The input end of the USB power supply circuit 3 is electrically connected with the power VCC, the output end of the USB power supply circuit 3 is grounded, and the USB power supply circuit 3 is electrically connected with the input end of the dimming circuit 4. The output end of the dimming circuit 4 is electrically connected with the input end of the LED lamp, and the output end of the LED lamp is grounded. The temperature sensing circuit 1 generates different electric signals according to the ambient temperature of the LED lamp, if the temperature is too high, the temperature sensing circuit 1 sends corresponding electric signals to the control circuit 2, and the control circuit 2 controls the USB power supply circuit 3 to be disconnected, so that the USB power supply circuit 3 stops supplying power to the dimming circuit 4, and the LED lamp is turned off.
The temperature sensing circuit 1 comprises a thermistor RT, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a voltage comparator N1, wherein the positive input end of the voltage comparator N1 is electrically connected with the output end of the thermistor RT, and the input end of the thermistor RT is electrically connected with a power supply VCC. The input end of the resistor R4 is electrically connected with the output end of the thermistor RT and the anode input end of the voltage comparator N1, and the output end of the resistor R4 is grounded. The negative input end of the voltage comparator N1 is electrically connected with the output end of the resistor R3, the input end of the resistor R3 is electrically connected with the output end of the resistor R1, and the input end of the resistor R1 is electrically connected with the power VCC. The input end of the resistor R2 is electrically connected with the output end of the resistor R1 and the input end of the resistor R3, and the output end of the resistor R2 is grounded. The output terminal of the voltage comparator N1 is electrically connected to the input terminal of the control circuit 2.
The control circuit 2 comprises a light emitting diode D1, a time relay KT1 and an NPN triode Q1, wherein the base of the NPN triode Q1 is electrically connected with the output end of a voltage comparator N1, the collector of the NPN triode Q1 is electrically connected with the output end of a time relay KT1, the input end of the time relay KT1 is electrically connected with the output end of the light emitting diode D1, the input end of the light emitting diode D1 is electrically connected with a power supply VCC, the first common end of the time relay KT1 is electrically connected with the power supply VCC, the normally closed contact of the time relay KT1 is electrically connected with the USB power supply circuit 3, and the emitter of the NPN triode Q1 is grounded.
USB supply circuit 3 includes USB power supply socket, USB power supply socket's input and time relay KT 1's normally closed contact electric connection, USB power supply socket's output ground connection, USB power supply socket be used for with dimmer circuit 4 electric connection, through the power supply or the power supply that stops of dimmer circuit 4, and then control the on-off state of LED lamp.
The dimming circuit 4 comprises a USB plug and a dimming control module, the USB plug is electrically connected with the USB power supply socket, and the USB plug is matched with the USB power supply circuit 3. The input and the USB plug electric connection of light modulation control module, the output of light modulation control module and the input electric connection of LED lamp, the output ground connection of LED lamp, light modulation control module are used for adjusting or closing the LED lamp to the luminance of LED lamp.
Time relay KT 1's second common port and power VCC electric connection, time relay KT 1's first normally open contact electric connection has warning circuit 5, warning circuit 5's input and power VCC electric connection, and warning circuit 5's output ground connection for through the chimes of doom suggestion user, be favorable to the user to learn the overheated information of LED lamp.
The alarm circuit 5 comprises a resistor R5, an NPN triode Q2 and an electric bell HA1, a first normally open contact of a time relay KT1 is electrically connected with an input end of the resistor R5, an output end of the resistor R5 is electrically connected with a base electrode of the NPN triode Q2, a collector electrode of the NPN triode Q2 is electrically connected with an output end of the electric bell HA1, an input end of the electric bell HA1 is electrically connected with a power supply VCC, and an emitter electrode of the NPN triode Q2 is grounded.
The third public end of time relay KT1 and power VDD's anodal electric connection, the second normally open contact electric connection of time relay KT1 has remote alarm circuit 6, and remote alarm circuit 6 is used for remote alarm, and the alarm sound also can be heard to the position that the user is far away from the LED lamp.
Remote alarm circuit 6 includes the transmitter, the receiver, resistance R6 and electric bell HA2, the second normally open contact of time relay KT1 and the input electric connection of transmitter, the output of transmitter and power VDD's negative pole electric connection, the input and the power VCC electric connection of receiver, the output of receiver and resistance R6's input electric connection, resistance R6's output and electric bell HA 2's input electric connection, electric bell HA 2's output ground connection.
The implementation principle of the dimming turn-off control circuit of the LED driving power supply in the embodiment of the application is as follows: when the ambient temperature of the LED lamp is low, the resistance value of the thermistor RT is reduced, the voltage of the positive input end of the voltage comparator N1 is smaller than the voltage of the negative input end, so that the output end of the voltage comparator N1 outputs a low level, the NPN triode Q1 and the NPN triode Q2 are both cut off, the emitter is not powered on, the USB power supply circuit 3 normally works at the moment, and the LED lamp is in an open state; when the ambient temperature of the LED lamp is high, the output end of the voltage comparator N1 outputs high level, the NPN triode Q1 and the NPN triode Q2 are both conducted, the time relay KT1 works normally, the light emitting diode D1 is conducted and emits light, the USB power supply circuit 3 is disconnected after time delay, the electric bell HA1 emits alarm sound, and the emitter is electrified and enables the electric bell HA2 to emit alarm sound through the receiver.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a LED drive power supply cuts off control circuit that adjusts luminance which characterized in that: the intelligent temperature control circuit comprises a temperature sensing circuit (1), a control circuit (2), a USB power supply circuit (3) and a dimming circuit (4), wherein the input end of the temperature sensing circuit (1) is electrically connected with a power VCC, and the output end of the temperature sensing circuit (1) is electrically connected with the control circuit (2);
the input end of the control circuit (2) is electrically connected with a power supply VCC, the output end of the control circuit (2) is grounded, and the control circuit (2) is electrically connected with the USB power supply circuit (3);
the input end of the USB power supply circuit (3) is electrically connected with a power supply VCC, the output end of the USB power supply circuit (3) is grounded, and the USB power supply circuit (3) is electrically connected with the input end of the dimming circuit (4);
the output end of the dimming circuit (4) is electrically connected with the LED lamp, and the LED lamp is grounded.
2. The dimming shutdown control circuit of an LED driving power supply according to claim 1, wherein: the temperature sensing circuit (1) comprises a thermistor RT, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a voltage comparator N1, wherein the input end of the thermistor RT is electrically connected with a power supply VCC, the output end of the thermistor RT is electrically connected with the positive input end of the voltage comparator N1, one end of the resistor R4 is grounded, and the other end of the resistor R4 is electrically connected with the output end of the thermistor RT and the positive input end of the voltage comparator;
the input end of the resistor R1 is electrically connected with a power supply VCC, the output end of the resistor R1 is electrically connected with the input end of the resistor R3 and the input end of the resistor R2, the output end of the resistor R2 is grounded, and the output end of the resistor R3 is electrically connected with the negative input end of the voltage comparator N1;
the output end of the voltage comparator N1 is electrically connected with the input end of the control circuit (2).
3. An LED driving power supply dimming turn-off control circuit according to claim 2, wherein: control circuit (2) include emitting diode D1, time relay KT1 and NPN triode Q1, NPN triode Q1's base and voltage comparator N1's output electric connection, NPN triode Q1's collecting electrode and time relay KT 1's output electric connection, time relay KT 1's input and emitting diode D1's output electric connection, emitting diode D1's input and power VCC electric connection, time relay KT 1's first public end and power VCC electric connection, time relay KT 1's normally closed contact and USB power supply circuit (3) electric connection, NPN triode Q1's emitter ground.
4. The dimming shutdown control circuit of an LED driving power supply according to claim 3, wherein: USB supply circuit (3) include the USB power supply socket, the input of USB power supply socket and time relay KT 1's normally closed contact electric connection, the output ground connection of USB power supply socket, the USB power supply socket be used for with dimmer circuit (4) electric connection.
5. The dimming shutdown control circuit of an LED driving power supply according to claim 3, wherein: time relay KT 1's second common port and power VCC electric connection, time relay KT 1's first normally open contact electric connection has warning circuit (5), the input and the power VCC electric connection of warning circuit (5), the output ground connection of warning circuit (5).
6. An LED driving power supply dimming turn-off control circuit according to claim 5, wherein: alarm circuit (5) include resistance R5, NPN triode Q2 and electric bell HA1, the first normally open contact of time relay KT1 and one of them one end electric connection of resistance R5, resistance R5 other end and NPN triode Q2's base electric connection, NPN triode Q2's collecting electrode and electric bell HA 1's output electric connection, electric bell HA 1's input and power VCC electric connection, NPN triode Q2's emitter ground.
7. The dimming shutdown control circuit of the LED driving power supply according to claim 4, wherein: the dimming circuit (4) comprises a USB plug and a dimming control module, the USB plug is used for being electrically connected with a USB power supply socket, the input end of the dimming control module is electrically connected with the USB plug, the output end of the dimming control module is electrically connected with the input end of the LED lamp, the output end of the LED lamp is grounded, and the dimming control module is used for adjusting the brightness of the LED lamp or closing the LED lamp.
8. The dimming shutdown control circuit of an LED driving power supply according to claim 3, wherein: the third public end and the power VDD electric connection of time relay KT1, the second normally open contact electric connection of time relay KT1 has remote alarm circuit (6), remote alarm circuit (6) are used for remote alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120793574.4U CN214413091U (en) | 2021-04-16 | 2021-04-16 | LED drive power supply turns off control circuit that adjusts luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120793574.4U CN214413091U (en) | 2021-04-16 | 2021-04-16 | LED drive power supply turns off control circuit that adjusts luminance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214413091U true CN214413091U (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120793574.4U Active CN214413091U (en) | 2021-04-16 | 2021-04-16 | LED drive power supply turns off control circuit that adjusts luminance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214413091U (en) |
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2021
- 2021-04-16 CN CN202120793574.4U patent/CN214413091U/en active Active
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